How to delete an AppID or regenerate a new AppToken?

When I created a new AppID, I saw a "delete" link just beside the "edit" link. But it is odd that the "delete" link disappears when I need it and how can I delete the AppID or regenerate a new AppToken now?

Off the top of my head I don't know for certain, but I believe that this is true. It would be easiest to just make a new AppID and token if you need a new one. There is no harm from having an unused AppID.